Spring bed-bottom



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W. BULKELEY.

SPRING BED BOTTOM. N0; 10. fig; Patented J ne 20,1882.

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-' W. BULKELEY SPRING BED BOTTOM. v No. 259,810. Patented JuneZO, 1882.

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UNITED STATES PATENT OFFICE.

WORTHINGTON BULKELEY, OF CLEVELAND, OHIO.

SPRING BED-BOTTOM.

SPECIFICATION forming part Of Letters Patent No. 259,810, dated June 20,1882.

I Application filed February 6, 1882. (No model.)

To all whom it may concern:

Be it known that I, WoRrmNeroN BULKE- LEY, a resident of Cleveland,county of Guyahoga, and State of Ohio, have invented certain new anduseful Improvements'in Spring Bed-Bottoms; and I do hereby declare thatthe following is a. full, clear, and exact description thereof,reference being bad to the accompanying drawings, and to the lettersofreference marked thereon, making a part of this specification.

This invention relates to that class of bedbottoms in which a series ofparallel slats are connected together by transverse stripsto form anextensible frame, which admits of being closed together or opened out tofit beds'of different widths, and for convenience in transportation.

The object of my invention is to produce a less costly, more simple, andconveniently-adjusted bed-bottom, which shall have proper rigidity inits frame, and yet admit of ready compression or extension, as occasionshall require.

In the accompanying drawings, Figure 1 is a plan view,-showing myimprovedbed-bottom extended, the conical springs being removed from oneend thereof to illustrate more clearly the arrangement of its diagonalcross-pieces. Fig. 2 is a like view thereof when closed together. Fig. 3is an end view of Fig. 2. Fig. 4 illustrates a modification in thearrangement of the diagonal cross-pieces. p

In said drawings, Arepresents slats of suitable material and dimensionsto form proper supports for conical springs B, which are fastened attheir lower ends to the slats by means of rivets, or in any othersuitable manner, either in regular or alternate order. The slats A A areplaced parallel to each other to form the bedbottom, and are connectedby means of transverse bars or strips 0 C. These strips are laid at anangle with the slats. Each strip is pivoted to one of the slats, whileits ends, extending out over the adjacent slats, are slottedlongitudinally at the points of intersection therewith to receive pins DD, which, projecting upward from the slats into the slots, serve to formtherewith a yielding or sliding joint. The slots throughout the entireseries being of equal length, serve to limit the extension of the bottomframe, as shown in Fig. 1, as well as to permit its being closed untilthe parallel slats are all brought into contact, as shown in Fig. 2.

The outermost slat of the series on each side may be combined with thenext adjacent slat, not only by its joint with the diagonal strip, butby means of one or more transverse strips, E,-riveted to the outer slat,and which, projecting therefrom at a right angle over the next slat, areconnected thereto by means of a pin on the slat and an extendedlongitudinal slot in the transverse strip, as shown in Figs. 1 and 2.

The diagonal slotted strips G 0, each hinged,

as shown and described, to one of the parallel slats A, permit of amovement of the slats to and from each other, so that different widthsmay be given to the bed-bottom, as desired; or it may be closed up intoa small compass for transportation, as shown in Figs. 2 and 3.

Upon each of the outer slats a lateral top rail,.G, is supported upon alevel with 'the top of the conical springs by means oftwo or more curvedor C-shaped springs rigidly secured at either end both to the slat andrail, so as to bend inward between the two, as shown in Fig. 3. Thesesprings not only support the top rails, but prevent any end motionthereof.

The top of the conical springs B B, which are secured upon the slats,may be connected by flexible chains, in the customary manner,

or by straps FF, Fig 1, of webbing, leather,

or other suitable material.

The pins D D, projecting through the slots in the sliding joints, may behea dedto prevent a disengagement of the strips from the slats, and oneor more of them may be threaded and fitted with nuts, by means of whichthe bedbottom, when adjusted, may be locked in position.

It is obvious that by a proper adaptation of my invention the bed-bottommay be made adjustable lengthwise instead of transversely, and also thatthe number as well as the an rangement of the slotted transverse stripsmay be largely varied without departing from the invention.

What I claim as new, and desire to secure by Letters Patent, is-

1. In an adjustable bed-bottom composed of parallel supporting-slatsconnected by transverse strips, each confined to a slat, the combinationof extended longitudinal slots formed in said strips at theirintersection with the adjacent slats with pins projecting from saidslats and fitted with rigid heads or adjustable nuts adapted to confinethe strips, substantially as and for the purpose set forth.

2. In an adjustable bed-bottom, the combination, with itssupporting-slats and one or more slotted transverse strips, of threadedpins and nuts, whereby the bed-bottom may be secured at any desiredwidth, substantially as described.

3. In an adjustable bed-bottom, the combination, with its parallelsupporting-slats, of diagonal strips, each pivoted at its center to oneof the slats and jointed to one or more of the adjacent slats at eitherend by means of 20 WORTH I NGTON BULKELEY.

Witnesses:

JOHN T. MoR'roN, L. H. WARE.

